Call Admission Control (Cac) Configuration - Samsung WEC8500 Operation Manual

7.3

Call Admission Control (CAC) Configuration

The CAC function is provided to protect existing calls from the calls incoming to a
wireless LAN. The APC does not allow an additional call when maximum allowed number
of calls per radio is reached.
7.3.1 SIP ALG Configuration
To make Call Admission Control (CAC) working, the Session Initiation Protocol (SIP)
Application Layer Gateway (ALG) function must be enabled. The SIP ALG analyzes a SIP
packet and forwards VoIP communication status to the CAC.
Configuration using CLI
The SIP ALG related commands are as follows:

sipalg enable: Configures whether to enable the SIP ALG function.

sipalg monitor-port: Configures SIP packet port to monitoring. It can be set max. 5
port. (default: 5060)

sipalg sip-error-resp-enable (SIP ERROR RESPONSE): Configures how to reject a
received call when maximum allowed number of calls is exceeded.
 Disable (default): No response for a received call connection request message.
The received message is not forwarded to the called side.
 Enable: Rejects by transmitting 503 Service Unavailable SIP response for a
received call connection request message. The received message is not forwarded
to a called side.

sipalg sip-detect-long-call-enable (SIP DETECT LONG DURATION CALL):
Configures whether to delete an internal resource by detecting abnormal remaining
calls. The values configured in the below two timers are used to judge an abnormal
remaining call.
 SIP No Answer Timeout (SIP Long Call Setuptimer): Maximum allowed time of
the status before call connection (range: 300-3600, default: 600)
 SIP Connect Timeout (SIP Long Call EstblshTimer): Maximum allowed time for a
connected call (range: 3600-86400, default: 7200)

sipalg sip-long-call-timeout (SIP NO ANSWER TIMEOUT, SIP CONNECT
TIMEOUT): Configures a time required to judge an abnormal remaining call and enter
SIP No Answer Timeout and SIP Connect Timeout in order.
To enable SIP ALG, execute the command as follows:
1) Go to the configure mode of the CLI.
APC# configure terminal
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CHAPTER 7. WLAN Additional Services
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